The GANNO Procedure

PROC GANNO Statement

Identifies the Annotate data set and draws the graphics output defined by that data set. It can also scale the output to accommodate data-dependent coordinate values and specify an output catalog.

Syntax

PROC GANNO ANNOTATE=Annotate-data-set
<DATASYS>
<DESCRIPTION='description'>
<GOUT=<libref.>output-catalog>
<IMAGEMAP=output-data-set>
<NAME='entry-name' | variable-name>;

Required Arguments

ANNOTATE=Annotate-data-set ANNO=Annotate-data-set

specifies a data set that includes Annotate variables that identify graphics commands and parameters.

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Storing Annotate Graphics

IMAGEMAP=output-data-set

creates a temporary SAS data set that is used to generate an image map in an HTML output file. The information in the image map data set includes the shape and coordinates of the elements in the graph and drill-down URLs that have been associated with those elements. The drill-down URLs are provided by one or two variables in the input data set. These variables are identified to the GANNO procedure with the HTML= and/or HTML_LEGEND= options.

The %IMAGEMAP macro generates the image map in the HTML output file. The macro takes two arguments, the name of the image map data set and the name or fileref of the HTML output file, as shown in the following example:

%imagemap(imgmapds, myimgmap.html);

See also:	Annotate Dictionary and Adding Links with the HTML= and HTML_LEGEND= Options.
Featured in:	Using Annotate Graphics in a Drill-Down Graph

NAME='entry-name' | variable-name

specifies the name of the GRSEG catalog entry and the name of the graphics output file, if one is created. The name can be up to 256 characters long, but the GRSEG name is truncated to eight characters. Uppercase characters are converted to lowercase, and periods are converted to underscores. The default GRSEG name is GANNO. If the name duplicates an existing name, then SAS/GRAPH adds a number to the name to create a unique name--for example, GANNO1.

See also:	About Filename Indexing
Featured in:	Storing Annotate Graphics Using the NAME= Option to Produce Multiple Graphs

Using the DATASYS Option to Scale Graphs

If your Annotate data set specifies a coordinate system that is based on data values (that is, XSYS, YSYS, and HSYS are assigned the values 1, 2, 7, or 8), the data values determine the size and location of the graphics elements on the output.

If the procedure that specifies the annotation generates axes (such as GPLOT or GCHART), by default the axes are scaled to accommodate the full range of data values and to fit in the procedure output area. Because all values are included in the axes, the graph displays all the Annotate output that is dependent on data values.

However, if the annotation displays with the GSLIDE or GANNO procedure, which do not generate axes, the data values might generate coordinate values that exceed the limits of the graphics output area.

In this case, you can use the DATASYS option to tell the procedure that the Annotate data set contains data-dependent coordinates and to scale the output accordingly. For an illustration of this process, see Scaling Data-Dependent Output.

When you use the DATASYS option, the GANNO procedure reads the entire input data set before drawing the graph and creates an output environment that is data dependent; that is, the environment is based on the minimum and maximum values that are contained in the data set. It then scales the data to fit this environment so that all graphics elements can be drawn.

Although the DATASYS option enables you to generate graphs using one of the data-dependent coordinate systems, it requires that the procedure scan the entire data set to determine the minimum and maximum data values. You can save this extra pass of the data set by using data-dependent values only in procedures that generate axes. Annotate coordinate system 5 (percent of the procedure output area) is recommended for use with the GANNO procedure. This coordinate system works equally well with the GSLIDE procedure if you decide to display the annotation with titles and footnotes.

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